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Population and Demography of Missouri

Missouri is a state in the Midwestern region of the United States. It is bordered by Iowa to the north, Illinois, Kentucky, and Tennessee to the east, Arkansas to the south, and Oklahoma, Kansas, and Nebraska to the west. 

Missouri is the 19th-most populous state in the United States.  The total Land area is 68,886 square miles (179,015 square kilometers) and there is an average of 90 people for every square mile. This makes Missouri the 28th most densely populated state in the US. As per the  United States Census Bureau, the population of Missouri in 2020 is 6,154,913 (6.15 million).

Estimated Population of Missouri in 2024 – 6,196,156 or 6.2 million

Missouri Population (2010-2020)

Missouri has a population growth rate of 2.8% during 2010-2020. It has had a population increase of 165,986 since 2010.  The median age in Missouri is approximately 38.3 years of age. The ratio of females to males is approximately 50.9% female and 49.1%, male.

Missouri Census 2020
Total Population6,154,913 (6.15 million)
Median Age38.3 years
Population Rank19th
Total Land Area68,886 sq mi (179,015 km2)
Area Rank21st
Population Density89.3/sq mi (34.4/km2)
Capital CityJefferson City
Largest CityKansas City

Source: US Census 2020 and estimates

Missouri Historical Population

Missouri has a population growth rate of 2.8% during 2010-2020.  In the year 1900, Missouri’s population was 3 million and in 2020 it reached 6.15 million, an increase of 3 million. 

Let’s look at decade population & percentage change 

CensusPop.% Change

Source: US Census 2020

Religion and affiliations

Christianity is the majority religion in Missouri followed by 77% of the population. The largest Christian denomination in California is Protestant (55%); Roman Catholic (16%); Mormonism (1%). Next comes the Unaffiliated population, 20% of the population doesn’t follow or adhere to any faith or religion.

Other non-Christian-based religions and faiths are followed by 3% of the population. and include Hinduism, Buddhism, Jews, Islam, and other smaller faiths.

For more details read Religion in Missouri 

Race and Ethnicity  in Missouri

In 2020, the White alone (non-Hispanic) population was the largest racial or ethnic group in Missouri, comprising 75.78% of the total population. It was followed by the Black or African American population whose share was 19,54%. Two or more races population was the third largest at 5%. Hispanic or Latino is at 4.92% & Asian population at 2.15%.

Ancestry in Missouri

As per Census Studies and estimate German, Irish,  English, American, and Italian have made the five largest ancestry groups in Missouri.

For more Details read Race and Ethnicity in Missouri

Top cities and Counties in Missouri

As of 2022, Missouri is divided into 114 counties and it has one independent city, The city of St. Louis which is county equivalent. Saint Louis County is the most populous Texas and The largest county by Land area.  Kansas City is the largest city by population in Missouri followed by St. Louis, Springfield, and Columbia. 

read more about counties in cities in Missouri 

Missouri Population 2024 | Missouri Demographics